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Yellow fever is an acute viral haemorrhagic disease transmitted by infected Aedes aegypti mosquitoes. Yellow fever is a viral disease of typically short duration. In most cases, symptoms include fever, chills, loss of appetite, nausea, muscle pains (particularly in the back) and headaches.
May 15, 2024 · Yellow fever is caused by a virus primarily spread to people through the bite of infected mosquitoes. Yellow fever virus is maintained in the environment between mosquitoes and non-human primates, like monkeys. If infected, people can spread the virus to mosquitoes and rarely to other people though exposure to infected blood.
People infected with yellow fever virus are infectious to mosquitoes (referred to as being "viremic") shortly before the onset of fever and up to 5 days after onset. Because of the high level of viremia, bloodborne transmission theoretically can occur via transfusion or needlesticks.
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The discovery of the causative agent of yellow fever was a decades-long process. While Cuban physician Carlos Finlay first described the Aedes aegypti mosquito as the carrier of the disease in 1886, he was ridiculed for this theory. Finlay’s discovery was accepted 20 years later only after U.S. Army scientists working with Dr. Walter Reed confirmed...
The last major outbreak of yellow fever in the U.S. occurred in 1905 in New Orleans. Today, yellow fever is endemic in tropical and subtropical regions of South America and Africa. While the development of a yellow fever vaccine (Theiler won a Nobel prize for this work) has saved countless lives over the years, the global burden of this disease is ...
Prevention of yellow fever primarily relies on vaccination, as there is no antiviral treatment available for the disease. While the live-attenuated vaccine has been demonstrated to be safe and effective (lifelong protection offered from one shot within 30 days of immunization in 99% of people who receive it), production can be slow and result in a ...
May 31, 2023 · WHO fact sheet about yellow fever, an acute viral haemorrhagic disease transmitted by infected mosquitoes. It provides key facts and information on signs and symptoms, populations at risk, transmission, treatment, prevention, WHO response.
Yellow fever is caused by a flavivirus that is spread by mosquitoes. Yellow fever is one of the most easily recognized and historically important viral infections. In the past, major epidemics of yellow fever caused tens of thousands of deaths.
Feb 27, 2022 · Yellow fever (YF) is a mosquito-borne viral illness caused by an arbovirus of the family Flaviviridae, genus Flavivirus, encompassing positive-single-stranded RNA viruses. The virus was isolated for the first time in 1927 in a male patient [ 1 ]. Transmission is primarily by mosquitoes [ 2 ].
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